Sharpening-machine for edge-tools.



H. w. BusLEn.

SHABPENING MACHINEFOR EDGE TOOLS. APPLICATION mm usc. 14. 1914.

1-139,4|;8`5. Patented May 18, 1915.

4 SHEETS-SHEET 1.

H. W. BUSLER.

SHARFENING MACHINE Fon EDGE TooLs.

APPLICATION FILED DEC. i4. 1914.

Patented May 18, 1915.

M H 7 n 4 .M/ 0 5 2., LL Mllll F 8 V. 5/ a 5, e 6 7 H. W. BUSL ER. I SHARPENNG MACHINE'FOR EDGE TOOLS. APPucATloN'HLED pec.14, 1914.

1,139,485. Patented May18,1915.

4 SHEETS-SHEET a.

H. Wl BUSLER.

SHAHPENING MACHINE FOR EDGE TOOLS.

APPLlYcATloN FILED Dsc. I4. 1 914.

1,139,485. Patented May18,'1915.

4y SHEETS-SHEET 4.

4 vllllllll HARRY W. BUSLER, F LITTLETON, NEW AHAM?SHIRE.

SHARPENING-MACHINE FOR EDGE-TOOLS.

Specification of Letters Patent.

Patented May 18, 1915.

Application filed December 14, 1914. Serial N o. 877.175.

T0 1U whom it may concern Be it known that I, HARRY W. BUSLER, a

' citizen of the'United States, residing at Littleton, in the county of Grafton, AState of New Hampshire, have invented certain new and useful Improvements in Sharpening- Maohines for Edge-Tools, of which the fo1 lowing is a description, reference being had to the accompanying drawings, forming a part hereof.

My invention relates to machines for sharpening edge tools, and particularly to machines for sharpening razor blades, knife blades and other cutting instruments in which the `blade or cutting portion of the tool is sharpened by abrading or grinding both faces of its edge.

My invention has for its object to provide a machine for such 'purpose which will be adapted 'to automatically grind, hone and burnish the blade or other tool by relatively coarse and fine grinding rolls and to finish the edge by stropping rolls.

My invention has for a further object the provision of means by which the blade or other tool is held against lateral movement during the operation of the grinding, honing, burnishing and stropping rolls and the rolls brought against opposite faces to form a sharp edge.

My invention has for a further object the provision of means by which thegrinding, honing and burnishing rolls are' operated in one direction relative to the blade or other tool being sharpened and the stropping rolls are operated in the opposite direction rela tive to such .blade o1 tool.

My invention has for a further object to provide means by which the blade o: other tool to be sharpened is conveyed through the machine automatically, or otherwise, so as to be placed in position. to be first operated on by the grinding rolls and then to be moved into position to be operated on by the stropping rolls. l My invention has for a further object to provide means for conveying the blade or other instrument to be sharpened so that it will be held against longitudinal movement during thel operation of the grinding'r'ohs and then moved longitudinally into position to be operated onv by` other rolls and then hold against longitudinal movement during the operation of Such other rolls.

My invention has for a further object to provide 'an arrangement of grinding rolls of differing character and stropping rolls in -connection with means for conveying the blade or tool through the machine by which such blade or tool in a single passage through the machine may begiven the line edge ne.- quired for a satisfactory razor blade.

My invention has for a further object to provide improved means for effecting the movement of the sharpening rolls from opposite sides toward the blade or other tool to be sharpened.

With these and other objects hereinafter explained in view my invention consists in the construction and combination of elements hereinafter described and particularly pointed out in the claims.

Referring to the drawings, Figure 1 is a front View in elevation of a machine embodying my invention. Fig. 2 is a rear view in elevation of the same machine. Fig. 3 1s an end elevation looking toward the right of Fig. 1. Fig. 4 is an end View looking to' 'ward the left of Fig. 1.

Fig. 5 is a cross sectional View on an enlarged scale on line 5 5 of Fig. 2. Fig. 6 is a horizontal sectional view of the mechanism shown in Fig. 5 on line 6-6 of'that ligure. Fig. 7 is a detail perspective view of the carrier for the blade or other tool to be sharpened.

Referring to the drawingswhich illustrate a machine particularly adapted for sharpening or resharpening blades of safety razors, 1 indicates the base of the machine, which is supported by legs 2, to which is secured, below the base of the machine, a'

frame 3 which serves to hold the legs rigid and to support the bearings 4 in which is carried the driving shaft G.

The driving shaft 6 is provided at one end with fast and loose pulleys 7 and 8 adapted to receive a belt from a shop shaft or other suitable' source of power. Ai vbelt shifter '9, arranged to be operated by a hand lever 10,

.serves to shift the driving belt from the loose to the fast Apulley to start the machine, or from the fast to the loose pulley to stop the machine.

Near the fast and loose pulleys the driving shaft is provided with grooved pulleys 11 and 12 of relatively large diameter, and near its other end the shaft is provided With grooved pulleys 13 and 14, also of; relatively y large diameter, and near its end the shaft is provided with pulley 15, of relatively small diameter, the pulleys 11 and 12f carrying belts for driving the shafts for rotating the grinding rolls, and the pulley 15 carrying a belt for driving the shaft through which the grinding rolls and the stropping rolls are' moved toward and from the blade or other toollto be sharpened.

I The machine base 1 is provided at its ends with standards 16 and 17 shaped somewhat like an inverted U, and between its ends'is a similar standard 18. These standards are arranged in line and extend over the sharpening rolls and support the means for `carrying the blade or other tool to be sharpened through the machine. These standards are connected by longitudinal vrods 19, 20 at their bases and rod 21 at their top's.

Between their legs are arranged the pairs of grinding rolls 22 and the pairs of stropping rolls 23. The grinding and honing rolls 22 are preferably made up of sections 22, 222, 223 and 22'* of different degrees of coarseness,the section 22 being preferably of the coarses't and most rapid cutting quality and the other sections being successively of relatively less coarse quality, the section 224 being preferably of such line quality as to effect a honing rather than a grinding of the blade or other tool which has been ground to a sharp edgev bythe sections 22', 222 and 223. The stropping rolls are rolls `having their surfaces of leather `or canvas or like material adapted to draw the edge to thel desired keenness.

The grinding and honing rolls 22 are mounted on shafts 25 in the upper ends of swinging arms 26, the lower. ends of which are arranged to swing on longitudinal shafts 27 which are suitably supported, as hereinafter described, in the machine base 1. One of swinging arms 26 is connected by links .28 to an-arm 29 carried by a longitudinal rock shaft 30 mounted in bearings 31 near the rear edge of the machine base 1. ."Rocli shaft 30 is provided with arm 32, the upper end of' which is connected to link 33,.the other end of which is connected to an'eccentric pin 34 on a disk 35 which is adjustably secured to a disk 36 ongthe end of a shaft 37 journaled in bearingsj-S'S on the rear edge of standards 16 and 1,85'

To the inner ends of the heads of the swinging arms 2 6 are secured depending arms 39, and between the lower ends of these depending armsds arranged a screw 40 carrying nuts 41 ron each side of each of the depending arms139. By means of these nuts the distancebetween the sharpening rolls Ves may be adjusted. The rotation. of shaft 37 through the eccentric pin 34 causes the arms 26 to swin'g'to and fro, swinging the grinding rolls '22 toward and from the blade or other toolvon which they are to act.

The stropping rolls 23 'are mounted .on shafts 25', vwhich are journaled in bearings in the upper ends of swinging arms 26 which are arranged to swing on shafts 27 and are arranged to be swung to and fro by link 28 connected at its outer end to the up per end of arm 29 on rock shaft 30.

The shafts 25 of the` grinding rolls are provided on their outer ends with pulleys 42 and the shafts 25 of the stropping rolls are provided on their outer ends with pulleys 45. The pulleys 42 are driven by belts 46 from pulleys 13 and 14 on the driving shaft, the forward belt 46 being crossed and the rear belt being straight, so that the two grinding rolls will be rotated, as indicated by arrows in Fig. 3, to cause their surfaces to cut away the edge of the blade in adirection away from the edge. The pulleys 45 are ,driven by belts 47 from pulleys 11 and 12 and the rear belt is crossed while the forward belt is straight, so that the stropping rolls are rotated, as indicated by arrows in Fig. 4, in directions to cause their surfaces to act toward the edge of the blade.

In the upper part of each of the standards 16, 17 and 18, directly above the rolls 22 and 23, aresecured two parallel llat track bars 48 and 49, spaced apart on a central line directly above the space between the grinding and stropping rolls. Above these bars 48 and -49 are arranged similar track bars 50 and 51, vspaced a short distance above the track bars 48 and 49 and also spaced' apart from each other, the four track bars 48, 49, 50 and 51 being so arranged that they are adapted to receive and guide in the spaces between them the horizontal,` arms 52, 53and the vertical arms 54, 55 of a cruciform carrier in which the tool to be sharpened is carried and which is here shown as adapted to carry asafety razor bla-de. For this purpose the lower vertical arm 55 is provided at its lower end with a longitudinal slit 56 adapted to receive a safety razor blade and also provided with holes 57, 58, -through the walls of the slot to receive bolts 59 carrying thumb' nuts 60,by which the walls of the slit 56 may be drawn together to clamp the razor blade to holdv it with its edge in position `to be acted on by .the sharpening rolls. e

The carrier is moved between the track bars by sprocket chains' 61 and 62. These sprocket chains are endless chains and are carried respectively by sprockets 63v and 64,

one at each end of the machine andsprockets 65 andl66, also one at each end of the machine. These sprocketwheels 63 and 65 at the right hand end of thel machine in Fig.

1 are carried on short shafts on which are also carried driving sprocket Wheels 67 and sprockets 70 and 71 on a cross shaft 72 jouri naled in bearings on the right hand end of the machine base l.

It will be seen that by the arrangement just described rotation of the shaft 72 Will,

' through the sprockets 7 0 and 71, rotate the 'the shaft.

sprockets (53 and 6.5 and canse the chains- 61 and G2 to travel, carrying with them the earrier and the blade held in its lower end.

The shaft 72 is arranged to be rotated intermittingly so as to feed the blade to be sharpened forward into position to be acted on by the first section of the grinding rolls and allow it to stop there while the rolls act on it, and to then move it forward into position to be acted on by the next section of grinding rolls and allow it to stop there while it is further acted on and then again move it forward and stop, and so on until all of the sections of the grinding rolls and the stropping rolls have acted to sharpen the blade and bring its edge to the ineness desired.

In order to swing the sharpening rolls to and fro and to effect the feeding forward of the blade to be sharpened the shaft 37 lis provided on its outer end at the right of the machine., as shown in Fig. 1, with a pulley 75 of relatively larger diameter, which is connected by a belt with the small pulley l5. On the shaft 37 near the pulley 75 is a cam 7G. On the endof cross shaft 72 is secured a ratchet wheel 77, the teeth ofv 'which are engaged by a dogl 78 pivoted on a lever 79 arranged to swing on the shaft 72 and extending upwardand downward from At its upper end this lever 7 9 is provided with a roller 80 arranged to be engaged by the cani 7G as the shaft 37 is rotated. The lower end of the lever 79 is connected by a spring 8l with the frame of the machine. As the sha-ft 87 rotates it will, through the eccentric pin 3ft, cause the sharpening wheels to swing to land fro, bringing one of them against one side of the edge of the blade and then bringing the other roll against the other side 'of the blade. Also as the shaft 37 rotates the cam 7G will actagainst the roller 80 to cause the lever 79 to swing toward the right of the machine, as shown `in Fig. 2 and, through the action of the dog 78 on the ratchet wheel 77, causing the shaft 72 to rotate to elfect the feeding forward of the carrier, as above described. tinues the cam 7G will pass by the roller 80 and the lever. 79 will then be returned to in' itialposition by spring 81. As soon as the cam passes by the roller '8O the rotation of shaft 72 stops and of course the movement of the feed chains stops and the carrier remains stationary, holding the blade to be sharpened Stationary to be acted on by the sharpening rolls between which it is located at the moment.

In order to provide for raising or lowering the sharpening rolls and' adjustmg them laterally, the shafts 27 and 27f-.,are carrled by plates 82 which have openings at their As the rotation of shaft 37 concent-ers to receive the ends of the shafts. At its ends each. of these platesis provided with open ended slots 83. These plates are held against the standards 1G, 17 and 18 by cap.

permitted adjustment not being, however,

enough to shift the position of the pulleys 42 and 45 enough tointert'ere with the driving ofthese pulleys by the belts 4:6 and 47.

In operation the sharpening rolls being adapted to proper position, a razor blade vis secured in the slit 56 of a' carrier and the carrier is inserted in the machine at the right of the machine, as shown in Fig.l 1, with the horizontal arms 52 and 53 between the track bars 48 and 50 and 49 and 51, and with its upper vertical arm 5e between the track bars 50 and 5l and its lower vertical arm between the track bars 48 and 49. The blade to be sharpened is thus held rigidly against any lateral movement. The machine being then started, the cam 7 G acting against roller 80 on lever 79, causes the feed chains to move forward, carrying with them the carrier and placing the blade to be sharpened between the sections 22 of the grinding rolls, where it stops. The rotation of the shaft 87, through the eccentric pin 3i, causes the pair of rolls 22 to swing lirst in one direction and then in the other to bring the grinding surface to first one roll and then the other against the sides of the edge of the blade to grind it away, the grinding rolls being rotated at a rapid speed relatively to the speed of rotation of the shaft by which the to and fro swing is effected, the rolls being driven by relatively large pulleys on the driving shaft .ind relatively small pnlleys on the shafts of the rolls, and the shaft 34 being driven by a relatively small pulley on the driving shaft and a relatively large pulley on the shaft itself.

The eccentric pin is so adjusted that after causing first one and then the 4other grinding roll to be brought into Contact with the blade to bc sharpened, it will cause the arms 26 and 26 to swing into vertical position so that neitherof them-will be in contact with the blade.v As thaims 26 and 26 reach this position, the shaft 37 completing a r'otation, causes the cam 76 to again act on the roller 80 to swing lever 79 and cause the'feed chains to advance the' carrier and bring the blade into position between sections 222 of ,10 stropping rolls, which' will give the blade line edge needed for use as a razor blade.

4l/Vhile only one carrier has been shown, it-

should be understood that a number of them may be used, so that one razor blade may be between the grinding rolls and another between the stropping rolls, or even, if 'a number of carriers are used, one blade may be between each pair of sections of the grinding rolls and foury or more blades may be between the stropping rolls at the same time. For, the purpose of changing the speed of shaft 37, the driving shaft may be provided with a pulley 15 andthe shaft' 37 with a pulley 75, so that by shifting the driving belt from pulleys 15 and 75 to 15 and 75 the shaft 37 will be driven at a higher speed,

as will be readily understood.

It should be understood that the term sharpening rolls as used in. the description and in the claims is to be understood as including the grinding, honing and burnishing rolls and also the stropping rolls, and the term grinding rolls 7 is to be understood as including the several sections 22', 222, 223 and 224, though in practice the sections 223 and 22A1 should be formed of very line grit, corresponding to or even liner than that of which the ordinary razor is made, so

that section 223 will hone rather than grind 40 and section 224' will burnish rather than grind or even hone.

It will, of course, .be understoodthat I dov not desire to be limited to the precise con' struction or arrangement herein described .and-shown, as it is obvious that the details v o' the construction and arrangement may be varied without departing from the spirit of 'the invention.

[ilaving thus 5o what I claim is:

l.. In a .sharpening machine for edge tools a sharpening roll arranged to be movable described my invention,

transversely to its axis, a carrier movable on aline parallel with the axis `of the sharpen- '55 ing roll adapted to hold the tool toibo sharpened,- means 'for moving the sharpening roll into and out of contact with the tool held in the carrier and means for'moving the carrier timed to operate as the sharpening roll is moved out of contact with the tool in the carrier.-

2. In a sharpening machine for edge tools tions ofdierent abrasive quality, a carrier movable on a line parallel with the axis of the sharpening roll adapted to hold the tool to be sharpened, means for moving the sharpening roll into and out of contact with crate as the sharpening roll is moved out of contact withthe tool in the carrier.

3. In a machine for sharpening edge tool l parallel sharpening rolls arranged in pairsv with a space. between them movable transversely to their axes, a carrier movable lon gitudinally of the sharpening rolls adapted to hold the tool to be sharpened in the space between the rolls constituting a pair, means for moving the sharpeningv rollsv transversely to their axes to bring them into and out of contact withthe toolin the carrier and means for moving the carrier timed to operate as the sharpening rolls are moved out ol contact with the tool in the carrier.

4. In a machine for sharpening edge tools parallel sharpening rolls' arranged in pairs having a space between them, the sharpening rolls comprising grinding rolls and dinally of the sharpening rolls 'adapted to -hold the tool to be sharpened on a line between the pairs of rolls, means for moving the sharpening rolls into contact with the tool to be sharpened and means formoving the'carrier from the grinding rolls to the stropping rolls. A f

5. In a machine for sharpening edge tools parallel sharpening rolls arranged in pairs having a space' between them, the sharpening rolls comprising grinding rolls and stropping rolls, a carrier movable lnoitudinallyl of the sharpening rolls 'adaptedto hold the tool to bel sharpened on aline between the pairs of rolls, means'for moving' the sharpening rolls into 'contactwiththe tool to be sharpened, means for moving-the carrier from the grinding rolls to the stropf ping rolls, means for rotating the grinding rolls in one direction,'and means for rotati ing the stropping rolls the :o tliergdirec tilting a pair being simultaneously movable transversely of their axes', a-carrier movable .longitudinally of the sharpening rolls adapted to hold the tool to b e sharpened in the' space between the, rolls constituting a pair, vand means for moving'the rolls constituting a pair to and fro to bring' first one j and then the other into Contact with the tool heldin the carrier. 7. In for sharpening edge tools parallel sharpeningrolls arranged in pairs with space between them, the rolls constituting a pair being simultaneously movable transversely of their axes, a carrier movable longitudinally of the sharpening rolls adapted to hold the tool to'be sharpened in the space between the rolls constituting a pair, means for moving the rolls constituting a pair to and fro to bring first one and then the other into contact with the tool held in the carrier, and means for moving' carrier movable longitudinally of the rolls r adapted to hold the tool to be sharpened in the space between the rolls, and means for moving the rolls transversely to their aXes .a pair of parallel sharpening rolls spaced apart and arranged to be simultaneously movable transversely to their axes, means for adjusting the space between the rolls,

means for adjusting the rolls in a direction at right angles toV their direction of movement, a carrier movable longitudinally of the rolls adapted to hold the tool to be sharpened in the space between the rolls, and means for moving the rolls transversely to their axes to bring first'one and then. the other into Contact with the tool held in the carrier.

This specification signed and witnessed this 5th day of Sept., A. D. 1914.

HARRY w.' BUsLER.

In the presence of- O. W. HUNKINS, R. C. BAILEY. 

